AtomicKotlinCourse/Object-Oriented Programming/Nested Classes/Exercise 1/task.md

Nested Classes (#1)

In FillIt.kt, State is only used to determine when there are no more Blank spaces in grid. Simplify the program by removing State and returning a Boolean from turn(). Once you have that working, add a third player by changing enum class Mark { Blank, X ,O } to enum class Mark {Blank, X, Y, Z }. In turn(), use a when expression to move to the next player value.

_{This task doesn't contain automatic tests, so it's always marked as "Correct" when you run "Check". Please compare your solution with the one provided!}